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Finding the Fourth Proportional to 494.70, 682.71 and 298.20

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Solution

The fourth proportional to 494.70, 682.71 and 298.20 is: 411.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.70 : 682.71 = 298.20 : x
  2. Step 2: Convert to fraction form
    494.70/682.71 = 298.20/x
  3. Step 3: Cross multiply
    494.70x = 682.71 × 298.20
  4. Step 4: Simplify right side
    494.70x = 203,584.12
  5. Step 5: Solve for x
    x = 203,584.12/494.70
  6. Step 6: Final answer
    x = 411.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.